Is Google Sync enabled?Go to Settings > Company Users > Edit your record > make sure Google Sync is enabled.

Are the Google permissions granted?Check if Copper is no longer granted access to your correct Google account. You can see your permissions here:https://security.google.com/settings/security/permissions?pli=1. Remove Copper off this list and we will automatically notify you with a "Reconnect" toaster in the bottom left corner of Copper or when you log in next.